Optimization of the Thickness of PET Bottles during Stretch Blow Molding by Using a Mesh-free (Numerical) Method
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B. Cosson
Abstract
The stretch-blow molding process of polyethylene terephthalate (PET) bottles generates some important modifications in the mechanical properties of the material. Considering, the process temperature (T > Tg) that is usually used, the material exhibits a very high viscosity and involves a strain hardening effect associated with the microstructure evolution. An anisotropic viscoplastic model coupled with induced properties, identified from experimental results of uniaxial and biaxial tensile tests previously published by Chevalier and Marco (2006), is presented in a first part of the paper. Secondly, we perform a numerical simulation to simulate the free inflation of a preform under an internal pressure with different parameters. Because the final strains are up to 300 to 400%, it generates important distortion of node distribution and we chose to use the mesh-free Constrained Natural Elements Method (C-NEM) for numerical simulation. The final goal is to use these simulations in order to fit the best parameter set leading to a quasi-homogeneous distribution of the thickness along the bottle. Homogeneous thickness implies homogeneous biaxial stretching and more uniform induced properties for the final bottle and this is an important industrial goal.
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© 2009, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Investigation of the Thickening Efficiency of HEUR on the Behavior of Two Different Latex Types
- Optimization of the Thickness of PET Bottles during Stretch Blow Molding by Using a Mesh-free (Numerical) Method
- An Experimental Setup to Measure the Transient Temperature Profiles in Water Assisted Injection Molding
- Experimental Investigation and Flow Modeling of Slippage Induced by Additives in Polyolefins in a Modular Co-rotating Twin Screw Extruder
- In-mold Melt Front Rate Control Using a Capacitive Transducer in Injection Molding
- Structural and Rheological Properties as a Function of Mixing Energy for Polymer/Layered Silicate Nanocomposites
- Study on Kneading and Molding of PP/TiO2 Nanocomposite
- Sustainable Biocomposites from Rice Flour and Sisal Fiber: Effect of Fiber Loading, Length and Alkali Treatment
- On-line Measurement Studies on Orientation Development and Characteristic Short-Period Diameter Fluctuation in High Speed In-line Drawing of Poly(ethylene terephthalate) Fiber
- Micro Replication by Injection-Compression Molding
- Utilizing Processing Parameters for Evaluating Polymer Viscosity during Plastication in Injection Molding
- PPS-News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Investigation of the Thickening Efficiency of HEUR on the Behavior of Two Different Latex Types
- Optimization of the Thickness of PET Bottles during Stretch Blow Molding by Using a Mesh-free (Numerical) Method
- An Experimental Setup to Measure the Transient Temperature Profiles in Water Assisted Injection Molding
- Experimental Investigation and Flow Modeling of Slippage Induced by Additives in Polyolefins in a Modular Co-rotating Twin Screw Extruder
- In-mold Melt Front Rate Control Using a Capacitive Transducer in Injection Molding
- Structural and Rheological Properties as a Function of Mixing Energy for Polymer/Layered Silicate Nanocomposites
- Study on Kneading and Molding of PP/TiO2 Nanocomposite
- Sustainable Biocomposites from Rice Flour and Sisal Fiber: Effect of Fiber Loading, Length and Alkali Treatment
- On-line Measurement Studies on Orientation Development and Characteristic Short-Period Diameter Fluctuation in High Speed In-line Drawing of Poly(ethylene terephthalate) Fiber
- Micro Replication by Injection-Compression Molding
- Utilizing Processing Parameters for Evaluating Polymer Viscosity during Plastication in Injection Molding
- PPS-News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts